resign
work overtime
be made redundant
be on flexitime
do shift work
work part-time
be sacked/fired/dismissed
retire
become unemployed
work long hours
lose your job because it is no longer necessary
You spend a long time working
lose your job, usually for doing something wrong
You have flexible working hours.
You work extra hours
stop working, usually because you are officially too old to work
general expression for when you lose your job
You don’t work all day
state formally that you are leaving a job permanently
You sometimes work during the day and sometimes at night.